Heat exchanger



K. MUHLEISEN HEAT EXCHANGER Filed June 10, 1925 @R y. m M N, .n vgl n m M l2 QN ww Nm N w SN, .Q R. -.3 E mm wm MM. vm Y Patented Oct. '5, 1926;/

UNITED STATES KARL MUHLEISEN, OF PHILADELPHIA,

PENNSYLVANIA, ASSIGNOR T0 SCHUTTE AND KOERTING- COMPANY, OF PHILADELPIIIA, PENNSYLVANIA, A CORPORATION F PENNSYLVANIA.

HEAT EXCHANGER.

Application led June 10,(1925. Serial No. 36,091.

My invention relates to heat exchangers of the character in which a relatively large number of tubes in the form of bundles are mounted within casings, the opposite ends'of which tubes are permanently or rigidly secured Within openings in tube-sheets located adjacent the oppositeends of said casings.

When heat exchangers of this character are employed for the purpose of cooling cerio tain liquids,

are caused-to How through the casing and to contact with or impinge upon the tubes therein the exterior surfaces of said tubes frequently become coated with a deposit |5- rendering -it desirable, if not necessary, that they be cleaned. It is desirable, therefore,

that a construction be provided whereby the bundle of tubes may be withdrawn from the casing for that purpose; that is, for thel pur' 2o pose of cleaning the same or removing the p deposit therefrom.

In constructions ofthis characterk one of the tube-sheets usually is rigidly connected to one endof the casing structure, while the other is movably mounted therein in order topermit freedom of expansion of the tubes without interference thereof with the casing.

The` general p object of the present invention fis to provide a construction com rising novel means whereby the bundle o tubes within a casing may be readily removed therefrom. f K It is also an object of the inventionl to provide4 a construction` comprising novel means whereby a head formin achamber may be detachably connected with the tubesheet which isvmovably mounted within the casing.

To these and other ends my invention com- 5o out departing from the-principle of the `invention.

In the drawing; Y Fig. 1 is a central. longitudinal section of a construction ofheat exchanger comprising means einbgdying my invention;

such as lubricating oils, which rehends theconstruction of means as here-4 Fig. 2 is a plan view of one of the members or elements constituting a part of the structure embodying the invention; 5

Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 1'; and

Fig. 4 is an enlarged/longitudinal lsectional view showing a fragmentary 4portion of the structure embodying the invention.

Referring to the drawing: 1 designates a casing of any suitable con- 65 struction provided with .a plurality of tubes y 2 mounted therein. These tubes are divided into two groups by a plate or diaphragm 3 extending longitudinally of the casing. The fluid" to be cooled'may enter the casing through an inlet 4. The' fluid whichenters the casing through the faid inlet travels forwardly in the. casin back and forth about the baille plates- 5. Such fluid asses around the outer or free edge of the plate or diaphragm` 3 and returns in the opposite direction owing in and out around the baffle plates 6. The fluid leaves the casing through the outlet 7. The cooling fluid enters the casing through an inlet v8 and B0 flows through the tubes above the ,plate or diaphragm 3 and thence through the tubes below the said diaphragm and out through the outlet opening 9.

The ends of the tubes 2 at the left hand end of the structure are secured in openings through a fixed or stationary tube-sheet 10.

The said tube-sheet is secured to the adjacent end of the casing 1 by means of flanges and bolts, designated as a whole by the ref-v 90 erence numeral 11,`in known manner. The construction thus far referred to forms no part of my invention and will not be described further or more in detail.

The `opposite ends of the tubes 2 are secured in openings through a movable or floating tube-sheet 15. In the construction as shown this tube-sheet is circular and is of a diameter less than the diameter of the casing 1, so that it may be withdrawn through the casing in case it should be desired to remove the bundle of tubes '2 therefrom for clean'y ing purposes. f

In order to prevent the cooling uld which flows first through the tubes abovethe late or diaphragm 3 and then backwar or in return direction through the vtubes low the lsaid plate it is necessary to connect the cap or head 16 to the outer .side of the tube-h t 15, so as toform a 1.19

chamber into which the liiuid from the first of the said tubes is discharged and from which it enters the second group of tubes below the plate or diaphragm 3. VThe cap 'or head 16 is of cup shape and is provided near its open end with a flange 17 which is secured thereto' by welding, brazing, or otherwise. The edge of the said cap or head is adapted to itfwithin an annular groove 18 formed upon the outer side of the tubesheet adjacent its periphery. -In order to prevent escape of fluid between they edge of the said cap or head and the bottom 'of the said groove the latter is provided with a packing 20 againstwhich the said edge contacts. i f- The tube-sheet 15 is provided upon the inner side ofvits outeredge with an annular groove 21 within which is adapted to be seated arc-shaped projecting ortions 22 formed upon the inner edges o a plurality of arcfs'haped members 23. These projections are formed by cutting out portions ofthe inner edges of the said members 23 upon Y one side thereof.

In the construction as shown I have shown two members 23, but it will be understood that the number of these members maybe increased if desired, and, it is also tobe understood that the ends of these members need not abut, as-shown, but may be spaced from each other. i

Both the flange' 17, previously referred to,

' and the members 23 are provided with openneet the flange 17 and the parts 23 together cated in juXta-position with respect to the ings 26' and 27 which are adapted to be brought into registry for the reception of bolts 28 which are adapted-tobind or conhead by welding, brazing, or otherwise. The

said flange isprovided with openings 32 at intervals therein and is adapted to be l0- flange 33 upon the adjacent :nd ofthe casing 1. Thelatter flan e is "provided Vwith openings 34 at interva s therein. 'v Boltsy 35 are adapted to be insertedthrougli vthe said,

openln These bolts are provided with -screw-t readed ends for the reception of nuts 36. ByV tightening Ithese nuts the cap l or head30 may be clampedfagainst ,the

the said .tube-sheet be said casmg.

flange33 to close the adjacent end of\the.

In order to remove the members 23 together with the cap or head 16 ythe cap or head 30 is first removed. Thereafter the nuts upon the Vbolts 28 are removed, after which said bolts may` be removed. Upon Y their removal the cap 16 may be removed and likewise the members 23. Afterl these parts have been thus removed and the tube plate 10 disconnected from the opposite end of the casing 1 the bundle of tubes 2 may be withdrawn from the Such withdrawal is permitted because the diameter of the tube-sheet 15 isK less than,` ,the interna diameter of the casing 1. The tubes having been withdrawn may be cleaned and thereafter r'efinserted and theY In a heat exchanger comprising a casingand a bundle of tubes therein, the combination of a movable tube-sheet'having openings therethrough within which oneend of each of the tubes of said-,bundle of tubes is' I permanently secured, the diameter of the said tube-sheet be' diameter of-the sai casing, the outer side au less than the internal' o of the outer edge portion of said tube-sheet being provided with an annular groove and the underside of the lperipheral portion of provided with a.

groove forming a shoul er, a cup shaped cap member having a laterally and cutwardly extending flange-located near its-- open end, the ed e .of thekopen end 'o said member being a apted. to be seated in-the groove in the outer side of the outer edge of the said tube-sheet, a plurality of' mem-- bers offarc-shape having grooves upon the upper sidesof the `inner peripheral. portions thereof forming shoulderspwhich are adapted toengage vthe `shoulders upon the said tubesheet,y and4 means for detachably securing.v

the'said arc-shaped members `to the' said flange and clamping ,theV said members and the said {iangejtogetherto effect clamping* ofthe capdnvlember against the vsaid tube" V In testimony that I 'claimthefforegoing Valamy invention, I have hereunto' signed Vmy 

